Help me understand

Hello i have been trying to understand this for a while, but what makes grand blue this much funny i mean at first i thought funny faces later i thought funny faces including unique comedy settings like water, characterization of characters, different scenarios etc but now it feels something even more than that but i cant say what that is, please help me. I am a very huge fan of this work. So, it is practically killing me that i cant understand the manga that i love on a deeper level. Please help me.